Having problems with your 2008 Mercury Grand Marquis ?

Rapid Acceleration 2006 Merc Grand Marquis (just 29,000 miles). Approaching Traffic light & cross walk at <<20 mph. Took foot off accelerator and just touched brake when car took off at high rate of acceleration. Was very difficult to stop car with footbrake so slamed the car in neutral. High revs abated and car finally stopped across other side of cross walk. A highly dangeraous situation. Can anybody tell me what caused this and how to rectify. Car currently at garage.

Posted / edited by AnonymousUser on : 23-07-2018

Answers :

Goto\015\012
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\015\012autos.yahoo.com/2006_mercury_grand_marquis/\015\012
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\015\012and u will find the repair manual for 2006 Merc Grand Marquis\015\012
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\015\012thank u................................
What has to be determined is if the idle problem is a command or mechanical problem. A command problem is the computer deciding the desired idle speed. If it is a command problem then it can be isolated rather quickly. Have your technician show you where the Idle Air Control (IAC) motor is located and how to electrically unplug it. When the condition occurs, unplug the IAC motor’s electrical connector. If the idle drops then you have a command problem. If it doesn’t you may have a sticking IAC motor. The fix for a sticking IAC motor is a cleaning or replacement. Most of the time I’ve found that a problem like yours lays with the IAC (Idle Speed Control Motor)..
Repair Help & Product Troubleshooting for 2008 Mercury Grand Marquis

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